Sometimes we feel so strongly about a subject we feel we must say, or even write something. Does that happen to you?
If you support the things Extinction Rebellion stand for then you may be interested in this opportunity to be published by them.
Instead of writing solely about causes, I work subjects I'm interested in into my fiction, and characters often share at least some of my views. For example my books Firestarter and Leave Nothing But Footprints both include references to taking care of wildlife and picking up litter. They're not what either book is about. They're both romances, but the characters care about more than just finding love.
Which causes have you written about?